Simulasi Numerik Pengaruh Kekasaran Permukaan Chamfered Continuous Rib Terhadap Perpindahan Panas Pada Solar Air Heater

NURSETO, AJI (2017) Simulasi Numerik Pengaruh Kekasaran Permukaan Chamfered Continuous Rib Terhadap Perpindahan Panas Pada Solar Air Heater. Other thesis, Universitas Sebelas Maret.

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    Abstract

    This study aimed to understand the effect of artificial roughness of the chamfered continuous rib on flat plate solar air heater in heat transfer enhancement. This study was carried out by conducting 2-dimensional CFD simulation with steady flow generation using ANSYS FLUENT. The Renormalization-group (RNG) k-ε model was selected as the most suitable turbulence model. The expected result of this study was the optimal pitch length of the ribs which ranges in the range of 3.800≤Re≤18.000 for the relative roughness pitch variation of 6,67≤P/e≤13,33 with constant relative roughness height of e/D=0,0325. The chamfer angle was kept constant at 15. The simulation showed that the secondary flow created by chamfered rib caused greater heat transfer over the duct. However, the insertion of artificial roughness on the ducts caused an increase in friction losses. The CFD investigation showed that there was a drop in the Nusselt number and average friction factor as the relative roughness pitch increased. A maximum value of Nusselt number and friction factor increased had been found to be 2,08 and 2,986 times over smooth ducts.

    Item Type: Thesis (Other)
    Subjects: T Technology > TA Engineering (General). Civil engineering (General)
    Divisions: Fakultas Teknik
    Fakultas Teknik > Teknik Sipil
    Depositing User: Nanda Rahma Ananta
    Date Deposited: 28 Dec 2017 09:49
    Last Modified: 28 Dec 2017 09:49
    URI: https://eprints.uns.ac.id/id/eprint/38310

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